S&S DIESEL LLY-250SAC-R-SET 250% OVER (REMAN) — 2004.5–2005 GM DURAMAX 6.6L LLY (SET OF 8)

S&S Diesel LLY-250SAC-R-SET 250% Over (Reman) — 2004.5–2005 GM Duramax 6.6L LLY (Set of 8)

Built for serious fuel demand, this 250% over, remanufactured SAC-nozzle injector set from S&S Diesel Motorsport is precision matched on Bosch equipment for tight variance and clean rate shaping—ideal for high-output LLY builds when paired with proper air and fuel system upgrades. 

Fitment

• Vehicle: 2004.5–2005 Chevy/GMC 2500HD/3500HD with 6.6L Duramax LLY (VIN “2”). 
• Configuration: Set of 8 remanufactured injectors with SAC nozzles; flow increased ~250% over stock (for competition/large-air builds). 
• Notes: Core return required by most dealers; tuning and supporting mods required.

What’s Included

• (8) S&S Diesel Motorsport reman injectors — LLY-250SAC-R-SET
• Matched set with S&S flow/variance standards and documentation
• Core program paperwork (when applicable)

Recommended Parts (Internal Links)

• Shop All S&S Diesel — match injectors with S&S pumps and components.
• Fuel System Upgrades — lift pumps, filters, lines, regulators for stable rail pressure.
• Turbochargers — larger single or compounds to support 250% injectors.
• Gaskets & Seals — injector install kits, banjo seals, return line seals.
• Tuning — custom calibration required for proper control and performance.

Helpful Notes

• Intended for high-flow applications; verify turbo, pump, and drivetrain readiness.
• Professional installation and post-install calibration are strongly recommended.
• Check local regulations for emissions compliance before use.

FAQ

• Do I need tuning for 250% over LLY injectors?

  Yes. 250% over injectors require custom calibration and adequate air/fuel support to operate correctly.

• Are these true SAC nozzles and flow-matched?

  Yes. S&S uses proprietary honing and matches nozzles/injectors to tight variance standards on Bosch equipment. 

• Is a core charge required?

  Most dealers require a core exchange and deposit. Review the seller’s core policy before purchase. 

• Will these fit all 2004 model-year trucks?

  Only 2004.5–2005 LLY applications (mid-year change). Confirm VIN and engine code before ordering.